When tech executive Tony Hsieh died at age 46 in a tragic 2020 fire after battling drug abuse, it was believed he had left behind a fortune valued at hundreds of millions of dollars and no will. But last March, seven typed pages, apparently containing the former Zappos chief executive’s final wishes, surfaced via snail mail to the Las Vegas courthouse. Copies of the purported will, dated March 2015, were also sent to the offices of a Las Vegas trust attorney named Robert Armstrong. A man who identified himself as Kashif Singh soon called Armstrong’s offices. Singh said he found…